<template>
  <view>
    <view class="cart-container" v-if="cart.length !== 0">
      <my-address></my-address>
      <view class="cart-title">
        <uni-icons type="shop" size="18"></uni-icons>
        <text class="cart-title-text">购物车</text>
      </view>
      <uni-swipe-action>
        <block v-for="(goods, i) in cart" :key="i">
          <uni-swipe-action-item :right-options="options" @click="swipeActionClickHandler(goods)">
            <my-goods :goods="goods" :showRadio="true" :showNumberBox="true" @radio-change="radioChangeHandler"
              @num-box-change="numChangeHandler"></my-goods>
          </uni-swipe-action-item>
        </block>
      </uni-swipe-action>
      <my-settle></my-settle>
    </view> 
      
      <!-- 空白购物车区域 -->
      <view class="empty-cart" v-else>
        <image src="/static/cart_empty@2x.png" class="empty-img"></image>
        <text class="tip-text">空空如也~</text>
      </view>
       
  </view>
</template>

<script>
  import {
    mapState,
    mapMutations,
    mapGetters
  } from 'vuex'
  import badgeMix from '@/mixins/tabbar-badge.js' // 购物车数字徽标显示
  export default {
    data() {
      return {
        // 删除的配置选项
        options: [{
          text: '删除',
          style: {
            backgroundColor: '#C00000'
          }
        }]
      }
    },
    computed: {
      ...mapGetters('m_cart', ['total']),
      ...mapState('m_cart', ['cart'])
    },
    mixins: [badgeMix],
    methods: {
      ...mapMutations('m_cart', ["updateRadioStatus", "updateCartCount", "removeGoodsById"]),
      radioChangeHandler(e) {
        this.updateRadioStatus(e);
      },
      // 修改购物车徽标数字大小
      numChangeHandler(e) {
        this.updateCartCount(e);
        uni.setTabBarBadge({
          index: 2,
          text: this.total + ""
        });
      },
      // 滑动删除动作的具体实现
      swipeActionClickHandler(goods) {
        this.removeGoodsById(goods.goods_id);
        uni.setTabBarBadge({
          index: 2,
          text: this.total + ""
        }); // 再修改完数据后主动修改购物车徽标数字
      }
    }
  }
</script>

<style lang="scss">
  .cart-title {
    height: 40px;
    display: flex;
    align-items: center;
    font-size: 14px;
    padding-left: 5px;
    border-bottom: 1px solid #efefef;

    .cart-title-text {
      margin-left: 10px;
    }
  }

  .cart-container {
    padding-bottom: 50px;
  }

  .empty-cart {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding-top: 150px;

    .empty-img {
      width: 90px;
      height: 90px;
    }

    .tip-text {
      font-size: 12px;
      color: gray;
      margin-top: 15px;
    }
  }
</style>
